Image: Aritmómetro Electromecánico
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Aritmómetro_Electromecánico.jpg (551 × 249 pixels, file size: 71 KB, MIME type: image/jpeg)
Description: Photo of the electro-mechanical calculator (1920) by Torres Quevedo.
Author: Francisco González de Posada y Francisco A. González Redondo
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes
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